Up-to-date life cycle assessment and comparison study of clean coal power generation technologies in China
Up-to-date life cycle assessment and comparison study of clean coal power generation technologies in China
复制标题
我国洁净煤发电技术最新生命周期评价与比较研究
DOI：
10.1016/j.jclepro.2012.08.003
复制
发表时间：
2013-01-01
影响因子：
11.1
通讯作者：
Cen, Kefa
中科院分区：
文献类型：
--
作者：
Liang, Xiaoye;Wang, Zhihua;Cen, Kefa
中国已成为世界主要能源消费国，2010年煤炭消费量占全球的48.2%。其中，发电行业使用的煤炭占中国煤炭消费量的48.0%，这在中国造成了不可避免的环境问题。本文介绍了完整的生命周期模型和比较评估目前清洁煤发电技术在中国，包括最先进的商业超超临界系统。在本研究中，采用生命周期评价（LCA）的能源和环境分析，其次是一个简短的经济讨论。目前的工作利用最新数据和各国的具体情况，涵盖了电力生命周期在最终消费之前的所有上游阶段：煤炭开采、煤炭运输和煤炭发电。模拟结果表明，超超临界系统（USC）具有最高的生命周期能源效率，由于最高的净发电效率和最低的厂用电量的情况下检查。全球变暖潜势（GWP）得分显示净发电效率的反向依赖关系。整体气化联合循环（IGCC）被证明是最清洁的技术，在大多数生命周期影响类别中得分最低，特别是在酸化潜力（AP）和光氧化剂形成潜力（POCP）方面。IGCC由于其复杂性而成为资本成本最高的系统，而USC和超临界系统由于其在中国的商业化而成为资本成本最低的系统。对燃煤发电与碳捕集与封存（CCS）相结合的评估表明，CCS技术可以显著减少燃煤电厂生命周期内的CO2排放，尽管CCS额外的能源消耗会产生更高水平的CO2。(C)2012爱思唯尔有限公司保留所有权利。
China has become the primary energy consumer in the world, consuming 48.2% of the world's coal in 2010. Of this percentage, 48.0% of China's coal consumption is used by the power generation industry, which causes unavoidable environmental problems in the country. This paper presents complete life cycle modeling and a comparative assessment of current clean coal power generation technologies in China, including a state-of-the-art commercial ultra super-critical system. In this study, a life cycle assessment (LCA) is adopted for energy and environment analysis, followed by a brief economic discussion. Incorporating up-to-date data and country-specific situations, the present work covers all upstream stages of the electricity life cycle before final consumption: coal mining, coal transportation, and coal power generation. The modeling results show that ultra super-critical systems (USC) have the highest life cycle energy efficiency due to the highest net generating efficiency and the lowest plant auxiliary power consumption among the cases examined. The global warming potential (GWP) scores show reverse dependencies of net generating efficiency. An integrated gasification combined cycle (IGCC) was demonstrated to be the cleanest technology and has the lowest scores in most of the life cycle impact categories, in particular in acidification potential (AP) and photo-oxidant formation potential (POCP). IGCC ranks as the highest in capital costs due to its complexity, while USC and super-critical systems are among the lowest in capital cost because of their commercialization in China. Evaluation of coal power generation combined with carbon capture and sequestration (CCS) shows that the CCS technologies can reduce the total life cycle CO2 emission from coal power plants substantially, although higher levels of CO2 are generated from the extra energy consumption by the CCS. (C) 2012 Elsevier Ltd. All rights reserved.